Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e30af643d8af1f2…

MALICIOUS

PDF

78.5 KB Created: 2021-02-23 21:05:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00b198d539f5520f3fc54539e48367c0 SHA-1: 55881cd50c785623bd432c60caa393c0bef3d9f8 SHA-256: 5e30af643d8af1f22220f669bc2ec3a253d9e0f9290bbafa0f996a9bffdf4bd7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The PDF contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/wix?keyword=a+love+to+last+september+15
    • https://cdn.sqhk.co/guwewaxa/eihjchd/live_wallpaper_iphone_star_trek.pdf
    • https://cdn.sqhk.co/zonelatu/sgdW74V/nba_2k20_myteam_ratings.pdf
    • https://dibalinelig.weebly.com/uploads/1/3/1/3/131380687/rewome-melalat.pdf
    • https://lepoboniw.weebly.com/uploads/1/3/0/9/130969744/5320d669582d86e.pdf
    • https://mebevoluw.weebly.com/uploads/1/3/0/7/130739105/valebokosu_rawirezalile_kavomifeloga_zusemose.pdf
    • http://gnatural.space/rotary_engineering_limited_annual_report7ui08.pdf
    • http://tehnikator.ru/wezororiwubaxopapigj0g83.pdf
    • https://cdn.sqhk.co/woleparos/hcibxig/85239402531.pdf
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/9c0d958c93.pdf
    • https://cdn.sqhk.co/nadipozow/ighfjf0/45659809977.pdf
    • https://cdn.sqhk.co/genamudazunu/NicTfhf/crazy_8_shopping_online.pdf
    • https://lugekovatisemo.weebly.com/uploads/1/3/5/3/135337030/pexopilogug_somisab_zukutuwipefa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jolunenafobuw/65834407626.pdf
    • https://s3.amazonaws.com/xukanomarexumu/38330774813.pdf
    • https://s3.amazonaws.com/paxunu/split_by_page_adobe.pdf
    • https://s3.amazonaws.com/vofadoloves/taber_s_cyclopedic_medical_dictionary_apk.pdf
    • https://s3.amazonaws.com/zaxawetawupo/51980396086.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c4.bin
b83fef7eaf52401920ff3afb9a75b642cd539355a666e130d0adc5f3196059b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 5332 bytes
font_01_sfnt_off000109db.bin
1a7bd2745c8915481058fcc412b64d855ef8f87f6f6b957a07f0f7202b531f72
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DB 10248 bytes